Sneak peek: 'Frozen' returns in 'Frozen Fever'

Even in the middle of winter, the world is yearning for a new Frozen. And it's here.

The filmmakers who brought us the animated hit musical Frozen in November 2013 have created a seven-minute short centered around Princess Anna (voiced by Kristen Bell), Princess Elsa (Idina Menzel), Kristoff (Jonathan Groff) and the snowman Olaf (Josh Gad).

Frozen Fever will show in theaters before Disney's live-action Cinderella, out March 13.

Source: Disney

Still from the movie "Frozen"

"The gang is back together. And literally it's like we never went away," says Gad. "Every day we're reminded of Frozen in our lives. So it feels like a continuation of a saga that has many parts still untold. It felt like coming home again after a short absence."

The first revisiting of the now-beloved characters features some surprising changes, including older sister Elsa's attitude. Elsa, weighed down by her royal duties in Frozen, has lightened up so much that she's throwing Anna a birthday bash.

Life for the two princesses has changed in other ways. Olaf and Kristoff (along with Sven, the non-verbal reindeer) add to a highly unorthodox family. Their goofy portrait, inspired by the website AwkwardFamilyPhotos.com, hangs in the castle.

"There's a slight dorkiness to the painting," says Lee. "But it's the best thing they could all wish for, just that ordinary family feeling."

The Frozen landscape is also changed, as the kingdom embraces warm weather and Anna's summer solstice birthday. The directors promise other surprises as well. But the sister's rock-solid support for each other doesn't change from Frozen, which took in more than $400 million at the box office.

"We continue this story of these two sisters, who only had each other growing up together," says Gad. "They are still supporting each other. That's what this is about."